The second group of wide receivers continued to post impressive numbers. Over half of the 23 participants in the group ran a 4.4-second 40-yard dash or better.

Clemson’s Sammy Watkins ran an unofficial 4.34-second 40-yard dash. His second unofficial time was 4.37 seconds. The times will help cement Watkins’ status as the top-rated wide receiver for May’s draft class.

Saginaw Valley State’s Jeff Janis certainly opened eyes with a blistering (unofficial) 4.30-second 40-yard dash. Janis is a bigger receiver at 6-3 and 219 pounds. Even if the number doesn’t hold up when official times are released, it’s still a display of elite straight-line speed.

The biggest disappointment among the second group was a poor first run from LSU WR Jarvis Landry. Landry isn’t a speed receiver, but he ran a 4.65-second 40-yard dash before pulling up with an injury.

The running backs were the last group to run Sunday. The explosive numbers continued with with 13 prospects running under 4.50-second 40-yard dashes.

Kent State’s Dri Archer was the first prospect to break the 4.3-second barrier with an official 4.26-second 40-yard dash. The mark was 0.02 seconds behind Tennessee Titans RB Chris Johnson for fastest recorded time.

Of the top-rated running backs, Auburn’s Tre Mason proved to be the most explosive with a pair of 4.4-second times.

The most surprising time may have come from Stanford’s Tyler Gaffney. Gaffney is a mid-round prospect, and he timed much faster than his play with the Cardinal indicated. Gaffney posted times of 4.43 and 4.48.

Here are the unofficial results for the quarterbacks, running backs and wide receivers: